AOC-SIMSO-HTC/AOC-SIMLC-HTC User’s Manual Clicking on the BMC Setting tab of the IPMI View management session in the Viewing Window (as shown in Figure 3-7) gives you detailed information on the BMC LAN Configuration, SNMP trap configuration and serial communication port of the BMC. In order to support the power-down state management capability under the IPMI specification, the manager has to configure the proper MAC address for each IP ad- dress. To deliver an IP packet to a receiver, the sender needs to know the receiver’s MAC address or the gateway’s MAC address. ARP (Address Resolution Protocol) is used to get the MAC address from the IP address.
While the managed system’s OS is running, the network protocol stack will take care of this function. However, when the managed system is in a power down state, this function cannot be ac- complished. Therefore, each MAC address has to be configured manually. The BMC and the OS running on a managed system may use different IP addresses for security reasons. For example, the OS may use 66.201.4.73 (which can be reached by public access) while the address for BMC may be set to 192.168.1.55, which can only be reached in a private LAN. But, LAN MAC addresses must be the exact same.
If the BMC uses a private IP address, you have to make sure that the manager’s system can communicate with the private IP address for the BMC on a managed system. BMC LAN Configuration This shows the IP address, LAN MAC, Gateway IP, Gateway MAC and Subnet Mask of the BMC and allows you to modify them. Note: Please make sure that the MAC address of the LAN and the gateway for the BMC are correct before updating it by clicking the Update button. Be careful to enter the correct values, especially for the LAN MAC. If you enter the wrong LAN MAC, IPMI View will not be able to connect to that system any more.
If you accidentally enter a wrong LAN MAC value, you may use the ipmicfg instruc- tions from the BMC firmware update (See section 4, page 13). SNMP This shows the SNMP trap configuration of the system needing to receive the SNMP traps generated by the BMC and allows you to modify them. To change the configuration on the BMC, type in the SNMP community name in the Community 3-28